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Eryops skull. A semi-aquatic amphibian that lived during the early Permian.

A semi-aquatic amphibian that lived during the early Permian.

Large, Top Quality Zlichovaspis Spinifera - 3.3" For Sale (#13478) - FossilEra.com

Large, Top Quality Zlichovaspis Spinifera - 3.3"

Large, Top Quality Zlichovaspis Spinifera - (Item Zlichovaspis Trilobites for sale. FossilEra your source to quality fossil specimens.

MicrosolenaReverseBeekiteCW366_585

MicrosolenaReverseBeekiteCW366_585

The next crinoid cup fossil appears to be an Eucalyptocrinites elrodi.

The next crinoid cup fossil appears to be an Eucalyptocrinites elrodi.

Aristocystites bohemicus

Aristocystites bohemicus

dilophosaurus | Dilophosaurus_skull.jpg

Dilophosaurus

The so-called "spitting dinosaur" from Jurassic Park. In reality, it was much larger and we have no idea if it could spit poison.

Devonian Period wasp nest coral found in the North Vernon Limestone of Clark County, Indiana.

A wasp nest in coral, from the Devonian Period, found in Indiana. I am obsessed with wasp nest. A fossilized wasp nest!

Devonian trilobite Kettneraspis williamsi of the Order Odontopleurida, found in Oklahoma

Devonian trilobite Kettneraspis williamsi of the Order Odontopleurida, found in Oklahoma

Trilobite Tuesday returns! Gabriceraurus mifflinensis is about 465 million years old, found in the fossil-rich Ordovician rocks of Wisconsin. Note the pronounced genal and pygidial spines that emanate, respectively, from the trilobite’s head and tail. Scientists are divided as to the role these spines may have played in the trilobite’s life. Some believe they were used to help in maneuvering through primordial seas, while others say they may have been used as an aid in feeding or even…

Gabriceraurus mifflinensis is about 465 million years old, found in the fossil-rich Ordovician rocks of Wisconsin. Note the pronounced genal and pygidial spines.

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